git.sesse.net Git - vlc/blob - src/misc/win32_specific.c

   1 /*****************************************************************************
   2  * win32_specific.c: Win32 specific features
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #include <vlc/vlc.h>
  26 #include "../libvlc.h"
  27 #include <vlc_playlist.h>
  28 #include <vlc_charset.h>
  29
  30 #ifdef WIN32                       /* optind, getopt(), included in unistd.h */
  31 #   include "../extras/getopt.h"
  32 #endif
  33
  34 #if !defined( UNDER_CE )
  35 #   include <io.h>
  36 #   include <fcntl.h>
  37 #endif
  38
  39 #include <winsock.h>
  40
  41 /*****************************************************************************
  42  * system_Init: initialize winsock and misc other things.
  43  *****************************************************************************/
  44 void system_Init( libvlc_int_t *p_this, int *pi_argc, char *ppsz_argv[] )
  45 {
  46     WSADATA Data;
  47
  48     /* Get our full path */
  49     char psz_path[MAX_PATH];
  50     char *psz_vlc;
  51
  52 #if defined( UNDER_CE )
  53     wchar_t psz_wpath[MAX_PATH];
  54     if( GetModuleFileName( NULL, psz_wpath, MAX_PATH ) )
  55     {
  56         WideCharToMultiByte( CP_ACP, 0, psz_wpath, -1,
  57                              psz_path, MAX_PATH, NULL, NULL );
  58     }
  59     else psz_path[0] = '\0';
  60
  61 #else
  62     if( ppsz_argv[0] )
  63     {
  64         GetFullPathName( ppsz_argv[0], MAX_PATH, psz_path, &psz_vlc );
  65     }
  66     else if( !GetModuleFileName( NULL, psz_path, MAX_PATH ) )
  67     {
  68         psz_path[0] = '\0';
  69     }
  70 #endif
  71
  72     if( (psz_vlc = strrchr( psz_path, '\\' )) ) *psz_vlc = '\0';
  73
  74 #ifndef HAVE_RELEASE
  75     {
  76         /* remove trailing \.libs from executable dir path if seen,
  77            we assume we are running vlc through libtool wrapper in build dir */
  78         int offset  = strlen(psz_path)-sizeof("\\.libs")+1;
  79         if( offset > 0 )
  80         {
  81             psz_vlc = psz_path+offset;
  82             if( ! strcmp(psz_vlc, "\\.libs") ) *psz_vlc = '\0';
  83         }
  84     }
  85 #endif
  86
  87     vlc_global()->psz_vlcpath = strdup( psz_path );
  88
  89     /* Set the default file-translation mode */
  90 #if !defined( UNDER_CE )
  91     _fmode = _O_BINARY;
  92     _setmode( _fileno( stdin ), _O_BINARY ); /* Needed for pipes */
  93 #endif
  94
  95     /* Call mdate() once to make sure it is initialized properly */
  96     mdate();
  97
  98     /* WinSock Library Init. */
  99     if( !WSAStartup( MAKEWORD( 2, 2 ), &Data ) )
 100     {
 101         /* Aah, pretty useless check, we should always have Winsock 2.2
 102          * since it appeared in Win98. */
 103         if( LOBYTE( Data.wVersion ) != 2 || HIBYTE( Data.wVersion ) != 2 )
 104             /* We could not find a suitable WinSock DLL. */
 105             WSACleanup( );
 106         else
 107             /* Everything went ok. */
 108             return;
 109     }
 110
 111     /* Let's try with WinSock 1.1 */
 112     if( !WSAStartup( MAKEWORD( 1, 1 ), &Data ) )
 113     {
 114         /* Confirm that the WinSock DLL supports 1.1.*/
 115         if( LOBYTE( Data.wVersion ) != 1 || HIBYTE( Data.wVersion ) != 1 )
 116             /* We could not find a suitable WinSock DLL. */
 117             WSACleanup( );
 118         else
 119             /* Everything went ok. */
 120             return;
 121     }
 122
 123     fprintf( stderr, "error: can't initialize WinSocks\n" );
 124 }
 125
 126 /*****************************************************************************
 127  * system_Configure: check for system specific configuration options.
 128  *****************************************************************************/
 129 static void IPCHelperThread( vlc_object_t * );
 130 LRESULT CALLBACK WMCOPYWNDPROC( HWND, UINT, WPARAM, LPARAM );
 131 typedef struct
 132 {
 133   int argc;
 134   int enqueue;
 135   char data[0];
 136 } vlc_ipc_data_t;
 137
 138 void system_Configure( libvlc_int_t *p_this, int *pi_argc, char *ppsz_argv[] )
 139 {
 140 #if !defined( UNDER_CE )
 141     /* Raise default priority of the current process */
 142 #ifndef ABOVE_NORMAL_PRIORITY_CLASS
 143 #   define ABOVE_NORMAL_PRIORITY_CLASS 0x00008000
 144 #endif
 145     if( config_GetInt( p_this, "high-priority" ) )
 146     {
 147         if( SetPriorityClass( GetCurrentProcess(), ABOVE_NORMAL_PRIORITY_CLASS )
 148              || SetPriorityClass( GetCurrentProcess(), HIGH_PRIORITY_CLASS ) )
 149         {
 150             msg_Dbg( p_this, "raised process priority" );
 151         }
 152         else
 153         {
 154             msg_Dbg( p_this, "could not raise process priority" );
 155         }
 156     }
 157
 158     if( config_GetInt( p_this, "one-instance" )
 159         || ( config_GetInt( p_this, "one-instance-when-started-from-file" )
 160              && config_GetInt( p_this, "started-from-file" ) ) )
 161     {
 162         HANDLE hmutex;
 163
 164         msg_Info( p_this, "one instance mode ENABLED");
 165
 166         /* Use a named mutex to check if another instance is already running */
 167         if( !( hmutex = CreateMutex( 0, TRUE, _T("VLC ipc ") _T(VERSION) ) ) )
 168         {
 169             /* Failed for some reason. Just ignore the option and go on as
 170              * normal. */
 171             msg_Err( p_this, "one instance mode DISABLED "
 172                      "(mutex couldn't be created)" );
 173             return;
 174         }
 175
 176         if( GetLastError() != ERROR_ALREADY_EXISTS )
 177         {
 178             /* We are the 1st instance. */
 179             vlc_object_t *p_helper =
 180              (vlc_object_t *)vlc_object_create( p_this, sizeof(vlc_object_t) );
 181
 182             /* Run the helper thread */
 183             if( vlc_thread_create( p_helper, "IPC helper", IPCHelperThread,
 184                                    VLC_THREAD_PRIORITY_LOW, VLC_TRUE ) )
 185             {
 186                 msg_Err( p_this, "one instance mode DISABLED "
 187                          "(IPC helper thread couldn't be created)" );
 188
 189             }
 190
 191             /* Initialization done.
 192              * Release the mutex to unblock other instances */
 193             ReleaseMutex( hmutex );
 194         }
 195         else
 196         {
 197             /* Another instance is running */
 198
 199             HWND ipcwindow;
 200
 201             /* Wait until the 1st instance is initialized */
 202             WaitForSingleObject( hmutex, INFINITE );
 203
 204             /* Locate the window created by the IPC helper thread of the
 205              * 1st instance */
 206             if( !( ipcwindow = FindWindow( 0, _T("VLC ipc ") _T(VERSION) ) ) )
 207             {
 208                 msg_Err( p_this, "one instance mode DISABLED "
 209                          "(couldn't find 1st instance of program)" );
 210                 ReleaseMutex( hmutex );
 211                 return;
 212             }
 213
 214             /* We assume that the remaining parameters are filenames
 215              * and their input options */
 216             if( *pi_argc - 1 >= optind )
 217             {
 218                 COPYDATASTRUCT wm_data;
 219                 int i_opt;
 220                 vlc_ipc_data_t *p_data;
 221                 size_t i_data = sizeof (*p_data);
 222
 223                 for( i_opt = optind; i_opt < *pi_argc; i_opt++ )
 224                 {
 225                     i_data += sizeof (size_t);
 226                     i_data += strlen( ppsz_argv[ i_opt ] ) + 1;
 227                 }
 228
 229                 p_data = malloc( i_data );
 230                 p_data->argc = *pi_argc - optind;
 231                 p_data->enqueue = config_GetInt( p_this, "playlist-enqueue" );
 232                 i_data = 0;
 233                 for( i_opt = optind; i_opt < *pi_argc; i_opt++ )
 234                 {
 235                     size_t i_len = strlen( ppsz_argv[ i_opt ] ) + 1;
 236                     /* Windows will never switch to an architecture
 237                      * with stronger alignment requirements, right. */
 238                     *((size_t *)(p_data->data + i_data)) = i_len;
 239                     i_data += sizeof (size_t);
 240                     memcpy( &p_data[i_data], ppsz_argv[ i_opt ], i_len );
 241                     i_data += i_len;
 242                 }
 243                 i_data += sizeof (*p_data);
 244
 245                 /* Send our playlist items to the 1st instance */
 246                 wm_data.dwData = 0;
 247                 wm_data.cbData = i_data;
 248                 wm_data.lpData = p_data;
 249                 SendMessage( ipcwindow, WM_COPYDATA, 0, (LPARAM)&wm_data );
 250             }
 251
 252             /* Initialization done.
 253              * Release the mutex to unblock other instances */
 254             ReleaseMutex( hmutex );
 255
 256             /* Bye bye */
 257             system_End( p_this );
 258             exit( 0 );
 259         }
 260     }
 261
 262 #endif
 263 }
 264
 265 static void IPCHelperThread( vlc_object_t *p_this )
 266 {
 267     HWND ipcwindow;
 268     MSG message;
 269
 270     ipcwindow =
 271         CreateWindow( _T("STATIC"),                  /* name of window class */
 272                   _T("VLC ipc ") _T(VERSION),       /* window title bar text */
 273                   0,                                         /* window style */
 274                   0,                                 /* default X coordinate */
 275                   0,                                 /* default Y coordinate */
 276                   0,                                         /* window width */
 277                   0,                                        /* window height */
 278                   NULL,                                  /* no parent window */
 279                   NULL,                            /* no menu in this window */
 280                   GetModuleHandle(NULL),  /* handle of this program instance */
 281                   NULL );                               /* sent to WM_CREATE */
 282
 283     SetWindowLong( ipcwindow, GWL_WNDPROC, (LONG)WMCOPYWNDPROC );
 284     SetWindowLong( ipcwindow, GWL_USERDATA, (LONG)p_this );
 285
 286     /* Signal the creation of the thread and events queue */
 287     vlc_thread_ready( p_this );
 288
 289     while( GetMessage( &message, NULL, 0, 0 ) )
 290     {
 291         TranslateMessage( &message );
 292         DispatchMessage( &message );
 293     }
 294 }
 295
 296 LRESULT CALLBACK WMCOPYWNDPROC( HWND hwnd, UINT uMsg, WPARAM wParam,
 297                                 LPARAM lParam )
 298 {
 299     if( uMsg == WM_COPYDATA )
 300     {
 301         COPYDATASTRUCT *pwm_data = (COPYDATASTRUCT*)lParam;
 302         vlc_object_t *p_this;
 303         playlist_t *p_playlist;
 304
 305         p_this = (vlc_object_t *)GetWindowLong( hwnd, GWL_USERDATA );
 306
 307         if( !p_this ) return 0;
 308
 309         /* Add files to the playlist */
 310         p_playlist = (playlist_t *)vlc_object_find( p_this,
 311                                                     VLC_OBJECT_PLAYLIST,
 312                                                     FIND_ANYWHERE );
 313         if( !p_playlist ) return 0;
 314
 315         if( pwm_data->lpData )
 316         {
 317             char **ppsz_argv;
 318             vlc_ipc_data_t *p_data = (vlc_ipc_data_t *)pwm_data->lpData;
 319             size_t i_data = 0;
 320             int i_argc = p_data->argc, i_opt, i_options;
 321
 322             ppsz_argv = (char **)malloc( i_argc * sizeof(char *) );
 323             for( i_opt = 0; i_opt < i_argc; i_opt++ )
 324             {
 325                 ppsz_argv[i_opt] = p_data->data + i_data + sizeof(int);
 326                 i_data += sizeof(int) + *((int *)(p_data->data + i_data));
 327             }
 328
 329             for( i_opt = 0; i_opt < i_argc; i_opt++ )
 330             {
 331                 i_options = 0;
 332
 333                 /* Count the input options */
 334                 while( i_opt + i_options + 1 < i_argc &&
 335                        *ppsz_argv[ i_opt + i_options + 1 ] == ':' )
 336                 {
 337                     i_options++;
 338                 }
 339                 playlist_AddExt( p_playlist, ppsz_argv[i_opt],
 340                   NULL, PLAYLIST_APPEND |
 341                         ( ( i_opt || p_data->enqueue ) ? 0 : PLAYLIST_GO ),
 342                   PLAYLIST_END, -1,
 343                   (char const **)( i_options ? &ppsz_argv[i_opt+1] : NULL ),
 344                   i_options, VLC_TRUE, VLC_FALSE );
 345
 346                 i_opt += i_options;
 347             }
 348
 349             free( ppsz_argv );
 350         }
 351
 352         vlc_object_release( p_playlist );
 353     }
 354
 355     return DefWindowProc( hwnd, uMsg, wParam, lParam );
 356 }
 357
 358 /*****************************************************************************
 359  * system_End: terminate winsock.
 360  *****************************************************************************/
 361 void system_End( libvlc_int_t *p_this )
 362 {
 363     if( p_this && vlc_global() )
 364     {
 365         free( vlc_global()->psz_vlcpath );
 366         vlc_global()->psz_vlcpath = NULL;
 367     }
 368
 369     WSACleanup();
 370 }